Pats for my wife's car which I don't like working on. Alternator's buried in there somewhere.
Apparently so. The triode is a champ, from memory 0.02% pure second harmonic distortion with the driver pushing the output to clipping. CCS loaded at 9.5 ma, ~200V on the plate, driving a 130K grid load.
Yes, the 6LR8 and 6LU8 are the same except for the base. I have used them both in the same circuit with no changes. The triode is much like a 12AT7 only a bit physically larger. It does respond well to a CCS load.
I tried both the 6LR8 and the 6LU8 in my SSE amp design using the crudest of breadboarding techniques, a box full of clip leads. Despite the careful lead dress and meticulous attention to wire placement, the test amp worked perfectly on the first try. 6LR8's 6LU8's and 6MF8's all worked well.
I made the whole thing into a tiny PC board amp too.
I found a 21LR8 with a big crack running up one side. I ran that tube into the red zone without it cracking worse or shattering. It's still good today nearly 10 years later!
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Today was a big one, CPAP machine, although co pay was only $200. Actually I've already had several months of trial and it's already made a positive difference. Cool that the clinic monitors it via wi fi and it can Bluetooth to an app on your phone. Have no intention of following the PM schedule, that would be a ton of money not covered by insurance
Not bought today but arrived today, a quad of 6P9.
These things are about as mint as can be! And heavy too!
I'm looking forward to experimenting with a true pentode.
These things are about as mint as can be! And heavy too!
I'm looking forward to experimenting with a true pentode.
I inherted my father's old AkArette camera but when I was doing some dry runs I shutter stopped working and a handyman tried to fix it but it was probably beyond repair, so I accidently got a new one ... didn't I on eBay. Mistakingly I did won an AkArex, so hastily I also made an effort to with THE AkArette and did.
So now I am eagerly awating two nice German cameras, the AkArette and the slightly simple Akarex (not MY cameras on the photos).
So now I am eagerly awating two nice German cameras, the AkArette and the slightly simple Akarex (not MY cameras on the photos).
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I ordered a bicycle (Gravity Base Camp LTD27) to replace the one that was stolen three weeks ago (Nashbar 26" MTB).
I can't see spending big bucks on a bicycle to ride the Tweetsy trail. All the dust eats chains and sprockets.
I can't see spending big bucks on a bicycle to ride the Tweetsy trail. All the dust eats chains and sprockets.
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Nice. Might be time to invest in one of those fancy chain cleaners that snap over the chain. Can't relate to that much wear. The only bike that I wore out was my 1st "10 speed" from my teenage years. Even after I put a new chain on it the chain just skipped from worn sprockets.
Funny purchase this week for me was video Santa chats for my girls. I just Googled for the cheapest price and got a SE Asian Santa from his home in Toronto with his tween son for an elf. Took some effort to keep a straight face at my kids' questions but they both enjoyed it and said they would do it again.
Basic 9-speed drivetrain (with a triple on the front), or have they all gone to 10 or 11 x2 even on MTB nowadays? When you DO have to change out a cassette and chain, don’t get the cheapest ones! They really do wear quickly. Mid grade SRAM (ie, PG50 or PG70 and the equivalent chains) really do hold up better. Also chain lube - use Rock and Roll (the blue variety. I use it on my road bike). Every time you run it through the mud.
My most recent bike has a Sturmey-Archer 3-speed internally geared rear hub. For my usual commute it's all the gears I need. It also has a plastic chain cover that completely encloses the chain, so it doesn't get full of grit or road salt.
Do they still make those 3 speed hubs? A buddy of mine has a 3 speed “retro” bike that was retro when he built it 15 years ago. Really pretty yellow steel frame, Sturmey-Archer hubs on hand built wheels, and just about everything else on it was Campy. Really old Campy. He said the hubs were the find of the century at the time - can’t just walk into a local bike shop and get something like that anymore.
I was pretty mechanically inclined as a kid, but man, those 3-speed hubs were like some kinda voodoo magic to my 10-year-old mind. I remember my uncle repaired one in his garage -took him like 3 weeks to figure it out, and he was the maintenance manager at a huge local factory. 🙂
I remember they were the opposite of a derailleur in that you had to be coasting while changing gears, or else...
I remember they were the opposite of a derailleur in that you had to be coasting while changing gears, or else...
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I also seem to remember some German company making a 14 speed internal planetary gear hub for r-bents and tandems and such. They wanted a small fortune for it - like $1500. But it would eliminate derailleurs altogether, on bikes with really long chains where they can be problematic.
Does that have the internal brake, which was activated by a reverse pedaling motion?
I thought those were great.
I didn’t think the 3-speeds could do that - it was the single speed hubs that had the coaster brake.
I found one once, and build a bike around it. It had bad internal drag, but may have been mis-adjusted.
Some 3-speed hubs have coaster brakes, and I think some have roller brakes. My bike has discs, which is nice because I don't like the idea of my rims being consumables.
Yes wg_ski they still make them, though Sturmey-Archers aren't made in England any more. Rohloff is the premium 14 speed internal geared hub, and they still cost a fortune. Shimano Alfine are supposed to be pretty good 7 and 8 speed hubs. They are a little heavier than derailleurs but no moving parts exposed to the elements, not many adjustments required*, and you can shift while stopped (might need to pedal backwards part of a rev to complete the shift, but you can do it while stopped at a light). I think they are ideal for city bikes, and now some have belt drive so no chain to lube.
My bike (bought it almost exactly a year ago) is made by VanMoof in Amsterdam. Generator front hub, built in LED lights, internally routed cables, really a very good bike for my daily ride in Montreal, which does not include hills. Would be tougher in Halifax or if my Montreal commute covered different parts of the city.
*Not many adjustments but they have to ge done right. Back in the spring I took the bike in to the shop to change the tires from studded winters to summers, and do a tune-up. The mechanic correctly noticed that the rear hub was a bit eager to shift out of first gear so he "fixed" it for me. I was half way home when I realized it was now a 1.5 speed hub. When the shifter said 1 it was in low gear, when the shifter said 2 it was in low gear, and when the shifter said 3 it was in second until you put any torque to it, then it would pop back into first. I got home, downloaded the service manual, and had it adjusted correctly in no time. We are DIY right?
Google Image Result
Yes wg_ski they still make them, though Sturmey-Archers aren't made in England any more. Rohloff is the premium 14 speed internal geared hub, and they still cost a fortune. Shimano Alfine are supposed to be pretty good 7 and 8 speed hubs. They are a little heavier than derailleurs but no moving parts exposed to the elements, not many adjustments required*, and you can shift while stopped (might need to pedal backwards part of a rev to complete the shift, but you can do it while stopped at a light). I think they are ideal for city bikes, and now some have belt drive so no chain to lube.
My bike (bought it almost exactly a year ago) is made by VanMoof in Amsterdam. Generator front hub, built in LED lights, internally routed cables, really a very good bike for my daily ride in Montreal, which does not include hills. Would be tougher in Halifax or if my Montreal commute covered different parts of the city.
*Not many adjustments but they have to ge done right. Back in the spring I took the bike in to the shop to change the tires from studded winters to summers, and do a tune-up. The mechanic correctly noticed that the rear hub was a bit eager to shift out of first gear so he "fixed" it for me. I was half way home when I realized it was now a 1.5 speed hub. When the shifter said 1 it was in low gear, when the shifter said 2 it was in low gear, and when the shifter said 3 it was in second until you put any torque to it, then it would pop back into first. I got home, downloaded the service manual, and had it adjusted correctly in no time. We are DIY right?
Google Image Result
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My 6 X 9 cm color darkroom went away when it became my daughter's bedroom. The darkroom in the garage experiments were largely unsuccessful, so I had to resort to using a lab, considerably raising the cost of pushing the shutter button. A photographer thinks about, and carefully frames up each shot. More thought and less button pressing is required when the cost goes up.
I got a Nikon Coolpix 880 when it appeared in 2000. 3.2 megapixels does not make for good 11 X 14 inch pictures, and it did turn me from a "photographer" into a "picture taker." The Canon SLR body got swapped for a DSLR body that took the film camera's lenses and I never looked back.
Now that film has resurfaced, I realize that I could never return to film. My 3 year old Lumix digital now has over 400,000 pictures on it. Yes, I have become a "picture taker."
Most of those pictures are time lapse setups though. Set up a shot, tell the camera to take 1 pic per second, push the button and go wander about with another camera.
All of the parts for the TSYNTH that I bought in post #4567 have arrived. My basement lab however is a total mess so assembly will start as soon as the current mess is resolved.
I had to clear off everything from two of the three workbenches so that I could run 200 feet of #12 Romex wiring through the floor joists that are my ceiling. The wiring also runs through the outside wall to a deck that is under construction. While I'm doing this, cables for a future ham radio antenna, TV, and cell phone booster are being run. Everything that was on the benches is now on the floor, and covered up since I need to drill a large hole through about 20 joists and run the wire from the breaker box.
I got a Nikon Coolpix 880 when it appeared in 2000. 3.2 megapixels does not make for good 11 X 14 inch pictures, and it did turn me from a "photographer" into a "picture taker." The Canon SLR body got swapped for a DSLR body that took the film camera's lenses and I never looked back.
Now that film has resurfaced, I realize that I could never return to film. My 3 year old Lumix digital now has over 400,000 pictures on it. Yes, I have become a "picture taker."
Most of those pictures are time lapse setups though. Set up a shot, tell the camera to take 1 pic per second, push the button and go wander about with another camera.
All of the parts for the TSYNTH that I bought in post #4567 have arrived. My basement lab however is a total mess so assembly will start as soon as the current mess is resolved.
I had to clear off everything from two of the three workbenches so that I could run 200 feet of #12 Romex wiring through the floor joists that are my ceiling. The wiring also runs through the outside wall to a deck that is under construction. While I'm doing this, cables for a future ham radio antenna, TV, and cell phone booster are being run. Everything that was on the benches is now on the floor, and covered up since I need to drill a large hole through about 20 joists and run the wire from the breaker box.
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Eagerly awating my REAL cameras ...
Thanks for hinting me/us about the Tsynth, but I wasn't that impressed when I checked some YT demos. However I found another smallish DIY-synth, the Jasper.
Trying my very best to understand what happens to my ordered drinks from Germany. One minute the package is ready to go and the nixt minute I got a "this and that are out of stock, order something else??".
Thanks for hinting me/us about the Tsynth, but I wasn't that impressed when I checked some YT demos. However I found another smallish DIY-synth, the Jasper.
Trying my very best to understand what happens to my ordered drinks from Germany. One minute the package is ready to go and the nixt minute I got a "this and that are out of stock, order something else??".